MJJ Tools

MJJ Tools brings together 167 free online tools in 12 categories for development and everyday tasks. Developers can format and validate JSON, encode and decode Base64, test regular expressions and generate UUIDs. The collection also includes calculators, unit converters, text utilities, image tools and translation tools. Choose a tool and use it directly in the browser, with no registration or installation required. Processing behavior varies by tool; refer to each tool’s instructions.